Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5d1cb9372952ae…

MALICIOUS

PDF

75.3 KB Created: 2021-04-01 08:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f2df349d12efbd253814cefdeaa2a5b5 SHA-1: 3608f88e843f58c409db2e70174fea7c6d2c694c SHA-256: ea5d1cb9372952aeccf871813c675ab5af3fbc5d1bbcd3db0d476b4b359f3555
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/award?keyword=cursive+writing+pdf+a+to+z PDF link annotation
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/1c74679456d40.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/rIiigcg/vutinubekeduwufufujodap.pdfIn PDF document text
    • https://rutedidatares.weebly.com/uploads/1/3/4/4/134490949/9173478.pdfIn PDF document text
    • https://cdn.sqhk.co/dokamaruxif/gkHKAHG/gokawebiwa.pdfIn PDF document text
    • http://wewifodajukovu.iblogger.org/what_is_positive_reinforcement_definition.pdfIn PDF document text
    • https://sinupumu.weebly.com/uploads/1/3/4/8/134893056/zodezowijew-kepudikipunaf-mixuromamosi-vevisakatubuxid.pdfIn PDF document text
    • https://voxomusixexuso.weebly.com/uploads/1/3/4/8/134851372/780270.pdfIn PDF document text
    • https://kanazotevixif.weebly.com/uploads/1/3/2/7/132740718/lidomimixigomo.pdfIn PDF document text
    • https://remitibomuko.weebly.com/uploads/1/3/4/8/134853657/7390378.pdfIn PDF document text
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/477727.pdfIn PDF document text
    • https://cdn.sqhk.co/ligazupevu/peLgeVm/20387397506.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/nLZjdje/2nd_american_civil_war_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/aTihjbM/traffic_management_operations_air_force.pdfIn PDF document text
    • https://tokitojunetibot.weebly.com/uploads/1/3/4/2/134265352/nezitobowej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_6d4ffb7c8981499884f67ec361fc9457.pdf?index=trueIn PDF document text
    • http://jojexapopexevof.epizy.com/29155361733.pdfIn PDF document text
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_10b08d8a8bff412b9afbbdcbdb901b46.pdf?index=trueIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_29b90ed3c87944b49d174894cd7e14df.pdf?index=trueIn PDF document text
    • http://kaxegukepoxar.rf.gd/ncert_accountancy_book_class_11_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/vimebutefeju.pdfIn PDF document text
    • https://0f3c41ac-de96-4ba7-a517-026d7435d592.filesusr.com/ugd/8631de_3fdacce435a84daba2ba455b39d97304.pdf?index=trueIn PDF document text
    • http://sajobovu.epizy.com/after_we_collided_movie_songs.pdfIn PDF document text
    • http://fepaxediv.rf.gd/71357818349.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/help_beatles_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/spread_offense_playbook_basketball.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/56970459530.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAF 5284 bytes
SHA-256: ff360e1cc722c8271dca09c69dcaf94baba050a4bc123d4f569b84b9e55d1770
font_01_sfnt_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 9832 bytes
SHA-256: adf66fcc3eb0a8bcf205ade1b4401b19fa487d4f58d7a4a298e227e2bb357bd3
font_02_sfnt_off0001116d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.